Yeah, in contexts which are sufficiently US-linked those protections may apply - I’ve edited my comment. Mostly not though. Anyway, even in the US, providing a

Yeah, in contexts which are sufficiently US-linked those protections may apply - I’ve edited my comment. Mostly not though. Anyway, even in the US, providing a decryption key would only be protection by the fifth amendment if testimony by a human is involved - not simply, for example, turning over a USB key or even a piece of paper on which the key is printed So this question is mostly moot for the scenario we are discussing, except if information in a human mind is needed to access the key.